181263645227616 has 192 divisors, whose sum is σ = 546593855431680. Its totient is φ = 51523022960640.

The previous prime is 181263645227597. The next prime is 181263645227629. The reversal of 181263645227616 is 616722546362181.

It is a self number, because there is not a number n which added to its sum of digits gives 181263645227616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196053781 + ... + 196976171.

It is an arithmetic number, because the mean of its divisors is an integer number (2846842997040).

Almost surely, 2^{181263645227616} is an apocalyptic number.

181263645227616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181263645227616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273296927715840).

181263645227616 is an abundant number, since it is smaller than the sum of its proper divisors (365330210204064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181263645227616 is a wasteful number, since it uses less digits than its factorization.

181263645227616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923917 (or 923909 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 60.

The spelling of 181263645227616 in words is "one hundred eighty-one trillion, two hundred sixty-three billion, six hundred forty-five million, two hundred twenty-seven thousand, six hundred sixteen".